Table 3 Descriptive characteristics of RCTs
Study | No_ patients (baseline) | No_ abutments follow-up (baseline) | Abutment location | Follow-up (years) | Intervention and control abutment type |
|---|---|---|---|---|---|
Andersson et al. 2001 [15] | 75 | 85 (89) | Maxilla and mandible | 1-3 | Prefabricated alumina/prefabricated Ti |
Jung et al. 2008 [13] | 30 | 30 | N/A | N/A | Customized Alumina based/customized Ti or gold |
Bressan et al. 2011 [22] | 20 | 20 | Maxilla | N/A | Customized Ti, gold alloy and Zr/contralateral tooth |
Galluci et al. 2011a [51] Galluci et al. 2011b [52] | 20 | 17 (20) | Maxilla | 2 | Prefabricated Ti with In-Ceram alumina blank/prefabricated Ti with PFM (cast-on gold coping) |
Hosseini et al. 2011 [66] | 36 | 75 | Maxilla and mandible | 1 | Prefabricated Zr/prefabricated metallic |
Büchi et al. 2014, Thoma et al. 2016a, Brandenberg et al. 2017 [23, 47, 48] | 20 | 20 | Maxilla and mandible | 1 | Customized Zr with pink ceramic submucosal veneering/customized Zr without veneering |
Carrillo de Albornoz et al. 2014 [67] | 30 | 25 (30) | Maxilla | 1 | Prefabricated Zr/prefabricated Ti |
Patil et al. 2014, Patil et al. 2016, Patil et al. 2017 [60,61,62] | 26 | 52 | Maxilla and mandible | 1 | Prefabricated curved grooved Ti/ Prefabricated conventional divergent Ti |
Baldini et al. 2016 [68] | 24 | 22 (24) | Maxilla and mandible | 1 | Prefabricated Zr/prefabricated Ti |
Paolantoni et al. 2016 [69] | 65 | 74 | Maxilla | 4 | Customized Zr (1 piece)/customized Zr (2 pieces) |
44 | 43 (44) | Maxilla and mandible | 1 | Customized Zr (screwed)/customized Zr (cemented) with or without submucosal veneering | |
Gil et al. 2017, Gil et al. 2019, Bittner et al. 2020 [63,64,65] | 40 | 33 (40) | Maxilla | 6 months | Customized, pink-anodized Ti/customized gray Ti |
Lops et al. 2017 [70] | 15 | 15 | Maxilla and mandible | N/A | Customized Ti, gold alloy and Zr/contralateral tooth |
Martinez-Rus et al. 2017 [71] | 20 | 20 | Maxilla | N/A | Customized Ti, gold-anodized Ti, pink hued Ti, and Zr on Ti-base/contralateral tooth |
Thoma et al. 2017 [72] | 24 | 24 | Maxilla and mandible | N/A | Customized fluorescent Zr on Ti-base/customized Zr |
40 | 39 (40) | Maxilla | 3 | Prefabricated Zr/CAD/CAM Zr | |
Amorfini et al. 2018 [73] | 32 | 30 (32) | Maxilla | 10 | Customized Zr with ceramic veneer fused on abutment/customized Zr |
Eisner et al. 2018 [49] | 20 | 18 (20) | Maxilla and mandible | 3 | Customized Zr with pink ceramic submucosal veneering/customized Zr without veneering |
Thoma et al. 2018a [54] | 33 | 33 | Maxilla and mandible | 6 months | Customized Zr directly veneered with veneering ceramic/customized Zr |
Heierle et al. 2019 [53] | 27 | 27 | Maxilla and mandible | 3 | Customized Zr directly veneered with veneering ceramic/customized Zr |
Laass et al. 2019 [50] | 20 | 16 (20) | Maxilla and mandible | 5 | Customized Zr with pink ceramic submucosal veneering/customized Zr |
Kraus et al. 2019 [57] | 44 | 32 (44) | Maxilla and mandible | 3 | Customized Zr (screwed)/customized Zr (cemented) with or without submucosal veneering |
Koutouzis et al. 2019 [74] | 28 | 26 (27) | Maxilla | 1 | Customized Ti convex/customized Ti concave profile |